u/Sr-salvadores

I'm going to be the Keeper for a Call of Cthulhu campaign. One of the players, who is already very experienced with CoC, created a character who used to be a police officer and was shot in the head. Against all odds, he survived. His wife witnessed the whole incident. After that, he retired from the police despite still being young and now works as a private investigator.

I'd like to create a plot twist involving his past that isn't obvious or predictable. Does anyone have any ideas?

Also, I apologize for any mistakes in my writing—English isn't my native language.